Combined oil and steam regulating valve for burners.



No. 806,904. PATENTED DEC. 12, 1905.

R. J. MULLIN. COMBINED OIL AND STEAM REGULATING VALVE FOR BURNBRS.

APPLICATION FILED Nov.17,19o4.

ROYAL J .l MULLIN, OF SEATTLE, WASHTNGTON'.

COMBINED OIL AND STEAM REGULATING VLVE FOR BURNERS.

Specification of Letters Patent.

:Patented Dec. 12, 1905. l

Application iled November 17, 1904. Serial No. 233,121.

of steam or compressed air and fuel-oil to a hydrocarbon -burner inaccordance with the required duty and in such quantities as to insurecomplete combustion of the fuel, and this irrespective of transitoryvariations in the pressure of the fluid-regulating medium and wherein noregulation of the valve-controlling devices is necessary other than aninitial adjustment suited to particular applications.

A further object of the invention is to provide means for mechanicallyclarifying the fuel-oil prior to its admittance into the regulatingdevice in order that the action of the latter will be more uniform andto obviate as much as possible the clogging of the apparatus through theaccumulations of foreign substances commonly found in the crude oils ofcommerce.

These and other objects I attain by the mechanism illustrated in theaccompanying drawings, in which- A Figure 1 represents a verticalcentral section of apparatus embodying my invention. Fig. 2 is anenlarged fragmentary sectional view of the valves and connections, andFig. 3 is a front elevation of a steam-boiler with my invention attachedthereto aswell as the everal pipe connections as ordinarily assem- Thisinvention, as afore alluded to, is not limited to the application ofsteam alone for the valve-controlling agent nor as the medium with whichthe combustible is conveyed to the burner; but for convenience and thepurpose of removing obscurity from the description I will hereinafteruse the word steam to include any fluid suitable to these objects orends.

In said drawings the reference-numeral 1 indicates a casing providedwith chambers 2, 3, and 4, in axial alinement with each other andseparated by stuffing-boxes 5 and 6.

The chamber 2has an enlarged portion 2 and is divided therein into twocompartments by a vibratory diaphragm 7 which is fiXedly connected by astem 8, passing through said stuffingboxes with a steam regulating valve9 and an oil-regulating valve 10, respectively, positioned in thechambers 3 and 4. These valves are preferably of the double-beat typeand are formed with faces (see Fig. 2) having different slopes or anglesof inclination-that is to say, the inclination of the faces of the valve9 from a vertical line are greater than vthose of the valve 10, and asthey are coincidently raised the opening of the former will inconsequence vary to a greater degree than will the other. Registeringseats 9 and 10 are provided for these valves in removable bush-pieces 11and 12 of the respective said chambers. Communicative ,connection ismade between the source of steam-supply by a pipe 13 entering thechamber 3 at 14, and upon the opposite side of this chamber is anoutlet-opening 15, whence the regulated steam is conveyed to the burner(denoted by 16 in Fig. 3) through pipe 17. In like manner theoil-chamber 4 is connected to the source of oil-supply and the saidburner by inlet-pipe 18, entering at 19, and a delivery-pipe 20 from theoutlet-opening 21. Connection is made vbetween the chamber 2 and thesource of steam-supply by a pipe 22, entering upon the side of thediaphragm adjacent of the valves, and through which pipe thesteam-controlling fluid is admitted and to act against the diaphragmtends to close the saidvalves. The particular object in connecting thisdiaphragmchamber by an independent pipe rather than from the adjacentsteam-valve chamber is that in the latter the pressure is unstable andfluctuates with every movement of the valve.

Positioned upon the opposite side of the diaphragm is a coil-spring 23,which is adjusted as to its tension by a regulating-screw 24, eX- tendedthrough a screw-threaded aperture 25 of the casing-head 26. A disk plate27 may advantageously be placed upon the outer end of the s ring toreceive and transmit the thrust o said regulating-screw. Perforations 11and 12 are referably provided in the said bush-pieces or the purpose ofpermitting small quantities of the 011 and steam to ow continuously tothe burner for the purpose of maintaining a small flame at the IOO IOS

orifice of the burner even where the regulating-valves are entirelyclosed.

Included in the oil-inlet pipe is a filterchamber 28, across which isstretched a finelyperforated strainer or membranous partition 29,whereby the oil is cleansed of dirt or other foreign substances held insuspension. To remove any such accumulations of substances from thepartition, I introduce a steam-injection pipe 30 into thisfilter-chamber upon the side of the partition next to the valve-casing,and upon the opposite side and in proximity of the bottom of thischamber is a draw-off pipe 31, and provide both the injection anddraw-off pipes with controlling cocks or valves 32 and 33.

The operation of the fuel and steam regulator will, it is thought, bereadily understood by persons skilled in the art to which my inventionappertains from the foregoing description Without giving a furtherdetailed explanation. It may be mentioned, however, that inasmuch as theoil and steam regulating valves are fixedly connected to a common stem,as is also the controlling-diaphragm which is acted upon by the initialoiler-pressure, and in view of the fact that the steam-controlling valveis constructed to open and closemore rapidly than the oilvalve, thoughboth move as a single piece, the slightest variation of theboilerpressure'will under any contingency admit the two fluids to theburner in quantities corresponding to the demand. For instance, anabnormal pressure of steam acting against the diaphragm will overpowerthe spring and tend to close the valves, or vice versa, when thesteam-pressuredrops below the normal, and the variation in the openingor closing of the steam-valve bein more rapid than that of the otherinsures t ie flow of steam to the burner at a more acceleratedoriretarded rate than does the liquid fuel through the valve of thelatter and in reverse proportion to the steam-pressure. In other words,when the steam-pressure is low the device acts to augment the steamgenerating flame at the burner and when the opposite condition prevailsthe generating-flame is lessened, thus acting to automatically retainthe steampressure within the boiler predeterminately with a minimumconsumption of the fuel.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is*

l. A device of the class described, comprising, in combination, a casingprovided with three non-communicative chambers a1'- ranged one over theother, two of said chambers being provided with valve-seats, valves forsaid seats, a sin le stem xedly connected to each of the sai valves, afluid-operated means located in the third chamber and also connectedwith said valves and adapted to move in unison therewith to open andclose the same and means for conveying fluid under substantially stablepressure to said' third chamber.

2. In a device of the class described, the combination with a casingprovided with two -valve-chambers and a diaphragm-chamber, a diaphragm,two valves, a stem positively connecting the said valves to each otherand with said diaphragm, said valve-chambers being provided with inletand outlet openings, pipes for said openings, an oil-straining deviceattached to one of the said pipes a steam-injection pipe Yleading intosaid oilstraining device and a draw-,off pipe leading from the same.

3. A device of the class described, comprising, in combination, acasing, a diaphragm and oil and steam regulating valves positioned innon-communicative chambers of said casing and ixedly connected to astem, said valves being provided with differently inclined or taperingseating-faces, communicative connection between the steamsupply and thechamber containing said diaphragm, a spring in said chamber positionedupon the opposite side of the diaphragm from the inlet of said steamconnection, and means whereby the tension of said spring may beregulated.

4. In a device of the class described, the combination with the casinghaving steam and oil inlet and outlet connections, the diaphragm, theoil and steam valves, a stem fixedly connected to said diaphragm andvalves, and a spring; of the strainer-chamber included in said oil-inletconnection and provided with a sediment draw-off opening upon one sideof a strainer provided interiorly of the chamber, said strainer, andcommunicative connection between the said chamber upon the opposite sideof said strainer from the draw-off opening and the said steam-inletconnection.

In testimony whereof I affix my signature in presence of two witnesses.

ROYAL J. MULLIN.

Witnesses:

PIERRE BARNES, PAUL BARNES.

